Du You

Du You, courtesy name Junqing (君卿), formally Duke Anjian of Qi (岐安簡公), was a Chinese historian, military general, and politician. He served as chancellor of the Tang dynasty. Du was born to an eminent aristocratic family in what is now Xi'an, Shaanxi, almost eighteen years before the abrupt rebellion of An Lushan, and received office for the privilege as administrator of Chi-nan commandery. Robert G. Hoyland considers him a "political thinker on a grand scale," comparable to Ibn Khaldun, but he is most often remembered for his thirty-six year compilation of the Tongdian, a historical encyclopedia of 200 sections (volumes) collecting laws, regulations, and general events from ancient times to his own.